[LLVMdev] Proposal: stack/context switching within a thread

[Kenneth Uildriks]

>  In fact, one could segment an inactive context
> stack at any time rather than copying the whole thing, as long as you
> can assume that there aren't any pointers into the context's stack
> living outside the context.
>

Never mind that... stacks by default don't have back pointers to
previous stack frames.  We'd still need runtime support apart from the
context switching bit, and without such support we'd have to copy the
whole stack.